GM Ramps Up China Strategy

SHANGHAI—With its lead in the world's biggest auto market threatened, General Motors Co. is tinkering under the hood.

GM had been the largest foreign car maker in China in terms of vehicles sold for the past eight consecutive years. But in the first nine months of this year the U.S. company trails rival Volkswagen AG, selling 2.31 million vehicles in the period to the German auto maker's 2.35 million vehicles.